Grease-gun



A. WHITE AND M. GRANUM.

GREASE GUN.

APPLICATION FILED JAN. 19, 1920.

1,388,625. Patented Aug. 23, 1921.

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GREASE GUN.

APPLICATION man JAN. 19, 1920.

1,388,625. a nted Aug. 23, 1921.

2 SHEETS-SHEET 2.

WITNESSES INVENTOR A WH/rE,

A TTURNEYS UNITED STATES PATENT OFFICE.

GREASE-GUN.

Specification of Letters Patent. Patented Aug. 23, 1921- Applicationfiled January 19,. 1920. Serial No. 352,353.

To all whom it may concern:

Be it known that We, ANDREW WHITE and MARTIN GRANUM, citizens of theUnited States, and residents of Montevideoyin the county of Chippewa andState of Minnesota, have invented certain new and useful 1mprovements inGrease-Guns, of which the following is a specification.

Our invention relates to grease guns, and a purpose of our invention isthe provision of a grease gun which is adapted to lubricate vehicleaxles without the necessity of removing the wheels from the axles.

We will describe one form. of grease gun embodying our invention andwill then point out the novel features thereof in claims.

In the accompanying drawings Figure 1 is a view, showing in section avehicle axle and wheel hub having applied thereto one form of grease gunembodying our invention; t Y

Fig. 2 is a view, showing in end elevation the grease gun shown inFig.1, with the attaching spindle shown in section and the crank nut ininactive position;

Fig. 3 is a view simllar to Fig. 2, showing the opposite end ofthegrease gun;

Fig. 4 is a detail view, showing the manner in which the spindle isconnected to the attaching nut;

Fig. 5 is a view similar to Fig. 2, showing the crank nut in the activeposition.

Similar reference characters refer to similar parts in each of theseveral views.

Referring specifically to the drawings, and

particularly to Fig. 1, H designates the hub of a. conventional form ofvehicle wheel in which works an axle skein A provided at its outer endwith a screwthreaded head A, and extending through the skein and head isa conventional form of lag screw S. In terposed between the hub and theskein A is a sleeve bearing C. In all forms of vehicle axles'and wheelswith which we are familiar, there is a limited amount of play betweenthe bearing C and the axle skein. This play provides a gap between thesleeve and axle at the upper side thereof, as clearly shown in thedrawings. It is by means of this gap that we effect a lubrication of thewheel and axle through the medium of the grease gun which "we will nowdescribe.

The grease gun embodying the subjectmatter of our invention comprises agrease barrel B consisting of an outer cylindrical member 15 and aninner cylindrical body 16 disposed concentrically of the outer memberand spaced therefrom to provide a grease receiving compartment. Theinner end of thebarrel B is closed by an annular wall 17,

such wallbeing formed with a circular series of slots 17, and an annulargroove 17 in which is mounted a tubular rubber gasket 18, as clearlyshown in Figs. 1 andZ-l. This wall .17 forms integral connection betweenthe outer cylinder 15 and the inner cylinder 16. As shown in Fig. 1, theinner wall of the outer cylinder 15 is screw threaded to recelve aplunger designated generally at P and comprising a cylinder 19 havingits forward end provided with an annularj flange 20 which carries acollar 21 threaded exteriorlyto coact with the threads of the outercylinder 15. The outer end of the cylinder 19 is closed by a wall 22which is formed axially thereof with an opening through which extends aspindle 23. As

shown in Fig. 1, the spindle 23 is screw threaded for a major portion ofits length and is adapted tobe slid forwardly or rearwardly within suchcylinder 19 through the opening in the member The outer end of thespindle 23 carries a winged nut 24: which is securedthereto by means ofa pin 25, while the inner end isdetachably associated with a sleeve nutdesignated generally at N. As shown in Figs. 1 and i, the sleeve nut Ncomprises acylindricalbody divided into two compartments by. a partition26 which isslotted, as at 26 to permit the application of the inner endof the spindle 23 thereto. The spindle 23 is locked within the partition26 by. a pin 27 which extends through suitable openings formed in thepartition and spindle in the manner indicated in dash lines in Fig. 4C.shownin Fig. 1, y

the inner wall of onecompartmcnt at the nut is threaded with right-handscrew threads 28 whilethe inner wall of the other compartment isprovided with left hand screw threads 28, the purpose of this threadingbeing to allow of the application ofthe nut to either head A of the axleA.

As shownin Fig.1, the nut Nis slidably fitted within the inner cylinder16 of the barrel B and is of a diameter to embrace and threadedly engagethe head A of the axle A. This nut N forms the securing means for theentire grease gun and is adaptedto securelyhold the gun as a unitagainst the axle for the application of the grease there to. This iseffected by rotation of the spin.-

.now ready for' its application to the axle" by a a it nut. designatedgenerally at R,

such nut comprising a pair of semicircular sections 29 and 29 'formedintegral with arms 30 and 30, respectively. As shown in f '1, 2' and 5,the arm30 constitutes an 1 extension of an operating lever L, and suchlever and armare pivoted on the wall 22 of the plunger by a bolt'31. 7The arm 30 is also pivotally connected to the bolt 31 but is movableindependently. of the lever L. 7 As TshOWninFig. 2,:the levers 30 and30are formed adjacent their outer ends with arcuate 32 which coact torovide an opening for the reception of a ho t 33. ,The arm 30 carries alink 34, to which is pivotally connected 9. locking lever 35. Thislocklever 35 is formed with :1 lug 35 which v dg'pted .toengage the lug35 formed on the free end: of the arm .30. As shown in Fig. 5 the twolugsare engaging each other ,with the arms, or30 in the active orcontreated position. It will be understood that the lever is'adapted tobe swung about its ivotso as to cause the lug 35toengage the vu'g '35?andtofthereby prevent the separation of the two arms. In the activeposition 0i thear'ms, they embrace the bolt 33 with the sections 29 and29' ofthe nut R threadedl embracing the spindle .23.

The operating lever L carries a handle L .forlthe-manual rotation of theplunger P to effect a ieeding thereof inwardly or out- 'wardly within ebarrel B. y

In the operation of the grease gun, the ung'er' P is removed from thebarrel B by rst moving the arms'30 and30 to the active position throughthe manipulation of the locking-lever 35, whereupon the plunger P may berotated bythe handle L to effect anaoutward feeding v spectvto the:barrel. -With the plunger P removed from the barrel- B, the latter isnow filled with grease and the plunger replaced to the position shown inFig. 1. I The gun is skeinv A.- Inapplyin the gun to the axle,therbarrel Bis placed over the head A in the manner. shown in Fig. 1, sothat the head threadedly engagesrthe nut N Should the head A be providedwith left-hand threads or the reverse to that shown in the drawing,

the-securing nutN can be easily reversed so as to presentthe left handthreads tothe head by removing the 'nut from the barrel and rei swm thesame on the p1n27.

With the nut N sc'rewed home upon the head A, the grease. asa unit isheld 66 securely on the axle skein. By now rotating "that the gasket 18prevents the grease from said plunger, and means for actuating thereofwith re an axle skein, means for actuatin screw threaded spindledetachably .itspositionupon the spindle 23 by,

the plunger P, it is fed inwardly thus ejecting the grease from thebarrel through the slots 17 and between the sleeve bearings C and theaxle skein A, it being understood 70 squee'zin out from between the gunand sleeve. Tn this manner a thoroughlubi'ieation. of the axle will bereadily effected without removing the wheel therefrom.

Although we have herein shown and described only one form of grease gunembodying our invention, it is to be understood that various changes andmodifications may be resorted to without departing from the spiritof theinvention and the spirit and scope of the appended claims.

Having thus described our invention, we claim:

1. In combination, an axle skein, including a threaded head, and agrease 11 comprising, a barrel, a plunger movab e within the barrel,means for actuating said nger, and means for attaching said barre tosaid skein comprising, a sleeve nut having right and left hand screwthreads, and a threaded spindle for actuating the nut.

2. A grease gun comprising a barrel including concentric cylinders, aplunger movable between said cylinders, a reversible nut adapted todifferent screw threads slidable within the inner cylinder of saidbarrel,

means for actuating said plunger, and means for actuating said nut.

3. A grease gun comprising abarrel including concentric cylinders, ahunger threadedly mounted between the c linders,

an attaching nut slidable within 0 inner cylinder of said barrehmeansfor actuating nut.

4. A grease gun comprising a barrel, a plunger within the barrel, anattaching nut having right and left hand screw threads slidable throughthe barrel, means for actuating said plunger, and means for actuatingsaid nut.

5. A grease gun comprising abarrel, a plunger movable within the barrel,an attaching nut adapted to'engage the head of said plunger, and meansfor actuating sud nut, the last means being supported by the first meansand threadedly eng ing the same.

6. A grease gun comprising a barrel inchiding concentric cylindersconnected at one of their ends by a perforated will, a gasket seatedwithin said well, a reversible nut slida-ble within the inner cylinder,0.

associated with said nut, a'plunger wonlung with in said barrel andincluding a cylinder, arms pivotally carried by the last mentionedcylinder and embracing said spindle, and a handle carried by one of thearms.

7. A grease gun comprising, a barrel including concentric cylindersconnected at one of their ends by a perforated wall, a reversible nutadapted to difierent screw threads slidable wlthin the inner cylinder, ascrew threaded spindle connected to the nut, a plunger working withinsaid barrel and disposed concentrically of said spindle, means carriedby the plunger enga cable with the spindle for maintaining the arrel infixed relation to the spindle and a feeding of the spindle through theplunger when the plunger is rotated, and a handle for actuating theplunger.

8. A grease gun comprising, a barrel, a reversible nut adapted todifferent screw threads slidably fitted within the barrel, a screwthreaded spindle for actuating the nut, a plunger threadedly engagingthe barrel and the spindle, and means for actuating the plunger.

9. A grease gun comprising, a barrel, a plunger threadedly engaging thebarrel, a nut slidablethrough the barrel, a spindle connected to the nutand disposed axially of the plunger, a split nut carried by the plungerand threadedly engaging the spindle, and a handle for actuating theplunger.

ANDREW WHITE. MARTIN GRANUM.

